Calculate the mole fraction each mixture of 72gram of water and 92gram of ethyl alcohol.
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Answer:
Mole fraction of water= 2/3
and of ethyl alcohol = 1/3
Explanation:
Number of moles in mixture of
1. water = 72/18= 4moles.
(molar mass of water [H2O] = 16 + 2×1= 18u)
2. ethyl alcohol = 92/46 = 2moles
(molar mass of ethyl alcohol [CH3CH2OH]
= 12×2 + 16×1 + 6× 1 = 46u)
Moles fraction of water = 4/2+4= 4/6 = 2/3
moles fraction of ethyl alcohol = 2/2+4= 2/ 6= 1/3
Alternative mole fraction of ethyl alcohol
= 1 - 2/3= 1/3
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